added non-docker case to script

bin/docker.sh

@@ -1,8 +1,13 @@
 #!/usr/bin/env bash
 # Outputs information about the current docker status
-DOCKER_STATUS=$(docker info)
-CONTAINERS=$(echo "$DOCKER_STATUS" | awk '/Containers/ {print $2}')
-RUNNING=$(echo "$DOCKER_STATUS" | awk '/Running/ {print $2}')
-STOPPED=$(echo "$DOCKER_STATUS" | awk '/Stopped/ {print $2}')
-IMAGES=$(echo "$DOCKER_STATUS" | awk '/Images/ {print $2}')
-echo -e "\ue7b0 $RUNNING \ufb99 $STOPPED \uf1c5 $IMAGES"
+EXISTS=$(which docker)
+if [[ -z $EXISTS ]] ; then
+    echo ""
+else
+    DOCKER_STATUS=$(docker info)
+    CONTAINERS=$(echo "$DOCKER_STATUS" | awk '/Containers/ {print $2}')
+    RUNNING=$(echo "$DOCKER_STATUS" | awk '/Running/ {print $2}')
+    STOPPED=$(echo "$DOCKER_STATUS" | awk '/Stopped/ {print $2}')
+    IMAGES=$(echo "$DOCKER_STATUS" | awk '/Images/ {print $2}')
+    echo -e "\ue7b0 $RUNNING \ufb99 $STOPPED \uf1c5 $IMAGES"
+fi